HP 750c Service Manual - Page 145
Carriage
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7. Carriage The purpose of this test is to check the internal circuits of the carriage PCA. Perform the carriage test as follows: 1 In the Service Tests submenu, scroll to 7 Carriage" and press Enter. SERVICE TESTS 7 Carriage 2 The following messages, in the order listed, are displayed on the frontĆpanel as each circuit is tested. 1 Testing CPROC COMM" 2 Testing SCONDOR" 3 Testing ATOD Converters" 3 If the test passes, the Pass Test / Press Enter" message is displayed on the frontĆpanel. 4 If the test fails, an Error Code is displayed on the frontĆpanel. If the carriage fails the test, try replacing one of the following components: 1 Carriage assembly ' page 6Ć34. 2 Main PCA ' page 6Ć9. 3 Trailing cable ' page 6Ć36. Only replace one component at a time and perform the Carriage" test again before replacing another component. Using this procedure you will be able to determine exactly which component failed. C4705-90000 Troubleshooting 8-27